Question

Scrubbers are devices used to remove _______ pollutants.

Answer 1

Pollutants:

• A substance released into the environment due to natural or human activity which adversely affects the environment is called a pollutant.
• For example, sulphur dioxide, carbon monoxide, lead, mercury, etc.

Scrubbing:

• The term “scrubber” is being referred to pollution control devices that are using liquid to wash unwanted pollutants from a gas stream.
• Scrubber systems such as chemical scrubbers, and gas scrubbers are a diverse group of air pollution control devices.
• Scrubbers are air pollution control devices that use liquid to remove particulate matter or gases from an industrial exhaust or flue gas stream.
• There are two types of scrubbers: Dry scrubbers and wet scrubbers.
• Dry scrubbers are primarily used to abate acidic gases, like those associated with acid rain.
• Wet scrubbers can remove particulate matter by capturing them in liquid droplets. The droplets are then collected, with the liquid dissolving or absorbing the pollutant gases.

Therefore, scrubbers are devices used to remove gaseous pollutants.